JEE Main 2022Chemistryp Block Elements (Group 13 & 14)EasyMCQ

JEE Main 2022 — p Block Elements (Group 13 & 14) Question with Solution

JEE Main 2022 (27 Jul Shift 2)

Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Boron is unable to form BF63-

Reason R: Size of B is very small.

In the light of the above statements, choose the correct answer from the options given below

Choose an option

Show full solutionCorrect option: B
Correct answer
BBoth A and R are true but R is not the correct explanation of A

Step-by-step explanation

Due to non-availability of d orbitals, boron is unable to expand its octet. Therefore, the maximum covalence of boron cannot exceed 4.

Boron is the first element from top in group 13 and the atomic size increases down the group. Therefore, boron is smallest in size.

Assertion A: True

Reason R: True but not correct explanation.
 

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About this question

This is a previous-year question from JEE Main 2022, covering the p Block Elements (Group 13 & 14) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.